Electric-lighting mechanism



H. G. [EWIS AND W. S. NIAYEH.

ELECTRIC LIGHTING IVIECHANISNI.

APPLICATION FILED MAR. I2, 19.20.

Patented Aug. 22, 1922.

2 SHEETS-SHEET l.

//////-2 AM 2 ,l

w-m b m A l/I WWII II H m, T

Invenny b emg leww 54 www? 51mg@ rrrrrrrrrrrr v H. e. LEWIS AND w. s. MAYER.

ELECTRIC LIGHTING MECHANISNI. i APPLICATION FILED MAK. I2. 1920. 1 ,426,499 x Patented Aug. 22, 1922..

2 SHEETS-SHEET 2;

`HENRY G. LEWIS Ann WALTER s. nini/nn or rninanntrnia rnnnsrnvleninf ASSIG-NORS TO ELECTRG SER'VIG SPPLES CGT IPENNSYLVANIA.

Application led March `12,

T 0 all whomz't may concern.'

lar/iris Be it known that we, llenar?. I and VALTER S. Mavim, citizens oil -the tain Improvements in ElectricRightingv Mechanisms," of which' the following is a specification.

rlhis invention is designed esifaecially to provide simple and eiiicient means tor auto' matically closing a` lamp circuit that'h-as been broken hy the failure oi alamp liythe rupture of its {ila-ment or its impennat contact, and it is adapted particularly ier use in a lighting system, containing lamps connected in series, to maintain the normal operations of the remaining lamps in case one or more of such lamps should he broken.`

In car lighting, as a leading application of the invention, the highest economy and efficiency are attained loy the arrangement of lamps, including headlights, in .series With the usual disadvantage that the failure of a single lamp breaks the circuit through other lamps With the loss et their lights.

It is an object of our invention topr'ovide a car lighting system vvith means for maintaining lamps connected in series at normal lorilliancy notwithstanding the 'failsre oiE one or more of such lamps. y

In the practice ot our invention, in its preferred form, We provide a finiture con-` taining an electromagnet or solenoid coil in circuit With each lamp oi a series, in comhination with conductors automatically connected by the electromagnet armature to close an auxiliary circuit around the lampupon the rupture of the circuit through thelamp and the consequent deener 'izing of the electro-magnet; the 'auxiliary circuit heing provided With resistance equal to that through the lampi to maintain the remaining lamps at normal brilliancy.

In the accompanying' dra-Wings, Fig. 1 isa Sectional elevation of a lamp fixture made in accordance with our invention; Fig. 2 is a sectional view of details of the same; Fig. 3 is a plan vie-W taken on the line 3X-,3X of Fig. 1, and Fig. 4 is a diagrammaticvievv of a car lighting system in which our improvements are adapted for' use.`

The mechanism, as illustrated in the drawings, comprises the insulating hase 1 adapted to be secured to a support 2, as a car roof,

C,lpetcation of Letters latent.

vthe lamp shade 6 `which man?, 'n conronn'rron ory nnnofrniciiienrine Meenemen.

.Patenten aag--aag ieee. 1920.. riaiivaeeaifis. f f' and a Spider or skeleton france3 tiied'tothe hase. A holder 4,l -for thev lamp 'seche-t5, has atop plate 4? fined to the ring 3? of the frame 3 and a? flared mouth 4"` ir .engaging supported cy Lthe holder. A i

i rthe hase 1 .is provided with.theinsulatin projections 1a, Pand 1 'for' supporting' p f spectively' the conducting` clips 7v and A7, 78 and 4Se and 9, and brackets iilgli -and`12 iiXed to the base v.carryfthe :respective resist-f ance tubes 13, 14 and 15. The resistance ytuhe 13.hasi" oppositev endsconnected by the conductors lland 17 Wit i respective' clipsv T'and 8; the resistance 14 hasits 4respective ends connected by `the conductors "18A and'v 19 with respective cli-ps 8a and 9, vandthe resistance 15 has its respective ends connected hy the .conductors 2O and 21 with the respecf tive clips 9 and 71. The' clip 7 connectsthe line Wire or conductor- 22 vwith the conductor 23 Which 'is connected'througl'i the electroina-gnet' coil 24 (engaged tothe hase hy av icl-shaped hearingf24f with the clipv25 fixed to the hase 1 an d connected by the conductor 26 with the lampiso-'cket contact 5a. The 1 V Contacts 30and 30 are( electricallycon.V

nectedV with the respectiveclips" S. and 8a and@` are adapted to he electrically connected and Y disconnected by the armature -24a of the coil 24, the armature being` provided with they cross piece or disk 24h vadapted to simultaneously engage both the contacts 30 and 3()EL loy the 'fall of the armature hy gravity and the action of the spring 31 when the electra magnet is deenergized. y An ornamental open guard or metal. basket 32 passes over 'the holder 4 and is .fined'to vthe hase 1, concentric with the ring 3a.

Assume the lamps-29 connected in' series inthe circuit 33 connecting the trolley Wire 34 with the ground and that one o-these lamps should break or fail. to close its circuit. Then the corresponding coil 24 is deenergized and the current (which flows through the conductors 22 7 23, 25, 26, 5a, 29, 5b, 28, 7at and 27 When the corresponding so, er, soa,

equivalent resistance to the broken lamp f circuit thus maintaining the current through the remaining,v lamps which burn at normal brlliancy.

Having claim: y y

l. ln an electric lighting mechanism, the combination of an insulating base provided With pair of insulating projections, a lamp socket holder, a. skeleton traine for said holder to said base, lamp socket carried by said holder, an electro-magnetic coil fixed to said base, an armature for said coil, a pair of conducting devices f ed to one of said projections, conductors connectingg said devices through said socket and coil, a pair of conductingI devices fixed 'to the other` of said 'projections and adapted to be connected by said armature, and conductors for connecting said devices serially through said armature in parallel rela-tion With said coil and socket.

`2. ln an electric lightinginechanism, the combination of an insulating base, a lamp described our invention, We

socket, means for fixing said socket to said base, a substantially U-shaped device. fixed to said base, an electro-magnetic coil'carried by said device, an armature for said coil, angular supports fixed to said base, resistance tubes respectively iis d between angular sup ports aforesaid, a pair of conducting devices iXed to said base, a pair oi" contacts iXed to 'said base, said armature adapted for connecting' said contacts, conductors connecting said devices through said socket Aand coil and conductors connecting said devices through said tubes, contacts and armatures around said coil and socket.

.3. ln an electric lighting mechanism, Vthe combination With an insulating base, a lainp socket fixed to said base, and a circuit com4 pricingu terminals or' said socket andan electro-magnetic coil fixed to said base, said coil having: an armature freely suspended therein, of an auxiliary circuit around said coil, said auxiliary circuit comprising contacts iixed to said base and adapted to be connected by said armature when said coil` is deenergized.

ln testimony whereof We have hereunto set our naines this 10th day of March, 1920.

HENRY G. LEIS. WALTER VS. MAYER. 

